Nice job on this video - one caveat I would add according to Paul Francisco (whom I asked this at EOW) is that 62.2-2013 does not require a pressurization test for the infiltration credit just a standard depressurization test.
Hey Corbett watching this I have 2 questions 1) since every home is different what factors would a designer look at to place this ventilation fan in the most efficient location? 2) is there an example you can think of that shows the essential systems of a high performance house, and where they are placed?
Hey Joey- depends on which type of ventilation system you mean. Generally, try to exhaust at moisture sources (bathrooms, kitchens) and supply where you spend the most time (bedrooms, at 8 hours per day). Check out the book 'Ventilation' from Building Science Press.
Hello,Did the example home have a basement, and if so, was it considered conditioned space?If it had a basement, and was not considered as conditioned space...why might not it be?
Is there any situation in which a contractor would choose to not apply ASHRAE 62.2 2016 to an existing dwelling when considering air sealing to the building shell ?
They need a standard for ventilation no matter what. Ignorance is not a legal defense. If they’re not using ASHRAE, they need some other defensible target.
What am i doing wrong . Ran the formula multiple times and i get different answer . Started with the division x 539 x 0.56 power factor to 0.4 /7.3 ???
Hey there..... We have a large factory with floor area 3067 square feet and height of 30 feet. How to calculate Air changes. We have taken 15 Air changes per hour for whole ventilation and 7 out of those 15 ACH we did is air flow(CFM) for fresh air we calculated? so its approximately 10000 CFM on fresh Air and 15000 CFM on return air Confused........
+Ali Abbasi In this case, Ali, the ventilation requirement I describe is NOT the one you should be using. ASHRAE 62.2 is only for residential living space, not to be used for a factory. You should visit ASHRAE's site to understand more about the requirement that applies to your situation.
Nice job on this video - one caveat I would add according to Paul Francisco (whom I asked this at EOW) is that 62.2-2013 does not require a pressurization test for the infiltration credit just a standard depressurization test.
The pain means we're alive! Love the burn.
Hey Corbett watching this I have 2 questions
1) since every home is different what factors would a designer look at to place this ventilation fan in the most efficient location?
2) is there an example you can think of that shows the essential systems of a high performance house, and where they are placed?
Hey Joey- depends on which type of ventilation system you mean. Generally, try to exhaust at moisture sources (bathrooms, kitchens) and supply where you spend the most time (bedrooms, at 8 hours per day). Check out the book 'Ventilation' from Building Science Press.
Will do captain! Thanks for the info.
Hello,Did the example home have a basement, and if so, was it considered conditioned space?If it had a basement, and was not considered as conditioned space...why might not it be?
Always consider basements conditioned space, unless you prove with zonal pressure testing that it’s not. This has happened to me exactly one time.
Is there any situation in which a contractor would choose to not apply ASHRAE 62.2 2016 to an existing dwelling when considering air sealing to the building shell ?
They need a standard for ventilation no matter what. Ignorance is not a legal defense. If they’re not using ASHRAE, they need some other defensible target.
What am i doing wrong . Ran the formula multiple times and i get different answer .
Started with the division x 539 x 0.56 power factor to 0.4 /7.3 ???
Hey there..... We have a large factory with floor area 3067 square feet and height of 30 feet. How to calculate Air changes. We have taken 15 Air changes per hour for whole ventilation and 7 out of those 15 ACH we did is air flow(CFM) for fresh air we calculated? so its approximately 10000 CFM on fresh Air and 15000 CFM on return air Confused........
+Ali Abbasi In this case, Ali, the ventilation requirement I describe is NOT the one you should be using. ASHRAE 62.2 is only for residential living space, not to be used for a factory. You should visit ASHRAE's site to understand more about the requirement that applies to your situation.
+Home Performance thanks... I went with ACH as per Ashare standards...agreed residential standard dun apply here... Gracias
Hi Corbett.
How did you calculate ELA=0.539 ft2 ?
Im confused here as well, Can you help?
AHH, you said multiply CFM of the blower door by .055 . Thank you!
Good sleuthing!
at 3:39 you had ELA / CFA but at 5:40, you only had ELA. what's with that?!
ELA is derived from CFM50
I am decent with math but my head hurts now, Thanks! lol